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Thread: Code P062F and Code P0633 Help

  1. #1
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    Default Code P062F and Code P0633 Help

    Cannot start my truck and getting two codes P062F and Code P0633

    What should I do?

    I tried to upload and new tune with no luck. It shows the tune took but still will not turn over and still shows codes.

    Help
    Last edited by Airtime; September 26th, 2009 at 11:27 AM.

  2. #2
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    Maybe I should order a back up ECM? What is a good place to buy one?

  3. #3
    Lifetime Member GMPX's Avatar
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    Is this a 2001 model by chance?
    Has been a problem on 2001's from the day they came out.
    If you want to try another ECM see this thread:
    http://forum.efilive.com/showthread.php?t=11325

    Also see if you can get an updated OS put in it (I'm still assuming this is a 2001 truck).
    I no longer monitor the forum, please either post your question or create a support ticket.

  4. #4
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    Its a 2008 GMC LMM.

    Thanks

  5. #5
    Lifetime Member GMPX's Avatar
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    Oh, that changes things. You need to get the ECM updated by the dealer, it's a known fault with the LMM. If your ECM OS is not 12628594 then that is the problem.
    I no longer monitor the forum, please either post your question or create a support ticket.

  6. #6
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    Since he has already locked his V2 to his ECM, any way he can just flash it with someone elses 8594 OS and bypass the dealer? But then you get into the whole CVN dealeo.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  7. #7
    Lifetime Member GMPX's Avatar
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    Not quite, there is slight variances with each model truck, if he knows someone with the same model and options that has the updated OS, then no problem.
    It should still be a warranty issue though.

    http://duramaxdiesels.com/forum/showthread.php?t=5079
    I no longer monitor the forum, please either post your question or create a support ticket.

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